Aniline-black resist



, one and one-half gallons of starch UNITE STATES PATENT reins;

WILLIAM 'r. WHITEHEAD, or

MAGOG, CANADA, ASSIGNOR 0F ONE-HALF- TO HENRY n. nnrnnor BOSTON, MAssAoHUsn'rrs.

ANlLlNE-BLACK RESIST QEGIFI CATION forming part of Letters fatent No. 499,689, dated June 13, 1893 application filed January 16, 1898- Berhd Ho. 458,582- (Ho specimens.)

To all whom it may concern.-

Be it known thatLWILLIAMT. WHITEHEAD, a subject of the Queen of Great Britain, residing at Magog, Province of Quebec, Dominion of Canada, have invented an Improvement in Aniline-Black Resists, of which the following is a specification.

My invention relates to the, production of white or colored patterns in cloth by a resist on an anilin-black ground, and has for its object the method of producing cloth having white or colored patterns on an anilin-black grodud, substantially as will be described.

Heretotore, in slop-padding or dyeing ani lin-black goods and printing thereon a white or color discharge, great dilficulty has been found in preventing too great anoxidation of the black, before the printing on of a pattern or figure, over oxidation making the production of a clear cut pattern or figure impossible. I have overcome this difficulty by first printing the cloth in a white or color resist, as hereinafter described, then slop-padding or dyeing the goods in the anilin-black liquor and suitably drying the cloth.

I wish to call particulan attention to-the fact that by myprocess I can successfully resist, on the printed parts of the cloth, the action of the anilin-black color in the operation ofslop-padding or solid dyeing,which, so fares known to me, has heretofore been impossible.

In the practice of my invention I take the cotton or other cloth and print the pattern thereon in a resist suitably compounded, as will be hereinafter described, and if a white pattern is to be produced I form the resist mixture as follows:six pounds of a zinc compound, such as oxide, hydrate, or carbonate of zinc to furnish the zinc which is the essential oractive element, one-halfgallon of water; and paste (one pound of starch per gallon); The zinc compound is first thoroughly mixed with the wa-.

tor, and then the starch paste is added, the latter forming the thickening. The resist described is then printed on the fabric to form the pattern and thcrcai'tcrd-ried, all as is usual and well-known. The printed fabric, in order that it may have an anilin-blackground or body, is then either blotched, printed, sloppadded or dyed in a solution of anilin-black pigments or coal-tar colors, or extracts of t produced by any of the receipes well-known to calico printers or dyers, dried: in the usual manner, and thereafter the anilin-bl'ack is developed by passing the fabric through an ani- 5 5 ha aging machine, or by steaming, with or without pressure; The fabric maythen be soaped,dried and finished in the usual-l manner. When the operation is completed it will be found that the parts of the fabric covered on by the resist mixture have not been at all atfected by the anilin-black color, the zinc ar resting the oxidation of the. anilin and preventing its development in the parts printed or covered with the resist, and the pattern is clearly and distinctly defined in a manner impossible to achieve by any of the processes now known to me.

My invention is equally well adaptc the production of colored patterns, by in woods, with the resist, in about the proper tions hereinafter set forth.

If a pigment color is desired 1. take pounds, more or less as may required, =1 the zinccomponnd, as the oxide, hydrate or carbonate of zinc; two quarts water; four 7 quarts gum tragacanth solution, (three ounces per gallon;) and about six pounds of ultra marine blue. The zinc compound is first do thoroughly mixed with the water, and then the thickening solution and the color are added, the resist so made being printed on the cloth as described.

Any other pigment may he used instead of ultramarine blue, the proportion'varying ac cording -to the shade to be produced and to the nature of the pigment itself.

The shade may be produced from a coal-tar color, as for instance, 1' may take six pounds ofa zinc compound; one and one-eighth gallonsofwater; nine ounces safranin; and one and one-half pounds of starch, and thoroughly mix and boil. If other coal-tar colors are desired, Bismarck brown, methyl blue, malachite green, oxyphenin, chrysamin, methyl violet, or any one of the coal-tar colors. having the property when used in combination with a zinc compound of fixing itself to the fabric, may be employed.

I have found in -my experiments that most of the so called basic colors will fix properly s assess yrith zinc compound, but some of the acid colors, such as soluble blue and "violet and acid liquor, in arying magenta, fail to properly fix with the oxide and produce good results.

It the color is to be produced from dye-wood or berry extract, I may take, for instance, six pounds of a zinc compound; one and one half gallons of Water, and thoroughly mix. Then I take three pints Persian berry extract, 48 Twaddle, and add the proper amount of starch to produce agood impression on the cloth, and to this i add one pint chrome acetate, 32- Twaddle, and mix all well together. The quantity of Persian berry is varied according to tbeshade desired, For other colors extracts of logwood, aspen, fnstic, qnerci'tron, bark, 650., can be used in place of the berry proportions according to the shade desired.-

Usnallywnere acolor is added to the resist mixture, the color may be still further fastoned by the addition of albumen to themixture in such. quantity and proportion as the nature of the particular case may make necessary or advisable.

While I have particularly specified oxide, hydrate and carbonate of zinc under the term zinc compound, 1 do not desire to berestrioted to the same, for while oxide of zinc is prei'erred by me for general use any zinc com- ,nopnd maybe employed with good results.

Nor do I confine myself to the exact stated quantity of zinc.

The gist of my invention lies in the employment of a zinc compound, as the essen tial oractive element, as stated,'in a resist.

I claim- 1. In the herein described process of producing cloth having patterns on anilin-blaok grounds, printing the'pattern upon the cloth in aresist containing a zinc compound as its essential or active element, suitably drying the cloth, and thereafter treating the cloth with'a solution of anilin blaek by blotobing, slop-padding, or dyeing, subsiantially as described.

2. In the herein described process of producing cloth having colored patterns on anilin-black grounds, printing the pattern upon the cloth in a resistcontaining a. zinc compound as its essential or active element, and a color, suitably drying the cloth and thereafter treating the cloth'with asolutiou of {milin-blaclc by blotching, s1op-paddingor dyeing, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM T. WHITEHEAD. Witnesses: GEO. W. Gnnoonr, JOHN C. EDWARDS. 

